I've read that mice have an incredible ability to memorize patterns, once they find food they can recall exactly how to get there...once study said cab drivers often had a similar skill.
So they advise moving things around once you set traps out. The mice will be forced to seek out a new route and will be more likely to find your bait.
We had a lot of mice this winter. The snap traps did nothing so I put out a lot of poison baits in the dirt cellar...didn't happen overnight but it was clear when the flies were massing on the warm side of the house outside that the deed had been done. I couldn't believe how much of the bait they had eaten.
-spence
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